John f



(No Model.)

J. F. PARKES.

TOOL HOLDER.

Patehted Jan. 8, 1884.

Jay-Me.

. my improvements.

UNITED STATES Ararat rFIcEQ JOHN F. PARKES, NORTH TONAVANDA,-NEW YORK, ASSIGNOR OF ONE- HALFTO CALEB W. WATKINS, OF SAME PLACE.

TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 291,531, dated January 8, 1884:.

Application filed April 23, 1883. (No model.)

To aZZ whom it may concern/.

Be it known that I, JOHN F. PARKES, of North Tonawandafln the' county of Niagara and State of New York, have invented new and useful Improvements in Tool-Holders, of which the following is a specification.

This invention relates to certain improvements in the construction of cutter-heads for planing-machines, and more particularly to that class of cutter-heads which are provided with longitudinal grooves in which the bolts engage, whereby the planing-knives are secured to the cutter'head. These grooves vary in width in different cutter-heads; and my invention has for its object to construct a toolholder for a beading-tool or other auxiliary tool, which can be readily applied to a cutterheadand adjusted to fit in the groove with which the same is provided.

My invention consists of the improvements which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure l is a fragmentary sideelevation, and Fig. 2, an

end elevation, of a cutter-head provided with Fig. 3 is a perspective view of the tool-holder. Fig. 4 is a sectional elevation of the same. Fig. 5 is an inside elevation of the tool-holder, illustrating a modified construction of the same.

Like letters of reference refer to like parts in the several figures.

A represents the cutter-head of a planingmachine, provided in two or more of its sides or face with undercut longitudinal grooves a a, which are adapted to receive the heads of the bolts, whereby the planing-knives are securedto the cutter-head.

B represents the beading-tool, and G the tool-holder, in which each beading-tool is secured. The tool-holder C is composed of a socket portion, (1, provided with a groove, 6, in which the beading-tool is secured by a setscrew, f. The socket e is provided on one side with an extension or ear, g, which overlaps the groove a in the cutter-head, and is provided with an opening, h, through which passes a fastening-bolt, 13. The latter has its head i arranged in the undercut groove a of the cutter-head, and is provided at its outer end with a screw-nut, i which bears against the outer side of the ear 9, whereby the toolholder is firmly secured to the cutter-head. The socket d is provided on its inner or rear side witha web or rib, j, which projects into the narrow portion a, of the undercut groove a, as clearly represented in Fig. 2. The web j is made narrower than the narrow portion ct of the groove a, and the play of the rib j in said portion of the groove is taken up by set-screws k, which are tapped into the side of The set-screws k are arranged on the rib j. the forward side of the rib 9', so that the pressure of the beadingtool is received bythe back of the ribj resting against the solid portion of the cutter-head, while the set-screws 7c are relieved from pressure, and serve merely as guides to fit-the rib in the groove; By adjusting the set-screws kthe rib can be adapted to fit snugly in grooves varying in width.

As represented in Fig. 5, the rib j may be made wedge shaped and provided with an adjustable wedge-shaped piece, Z,.applied to one side of the rib 7', so that by adjusting the piece'l lengthwise on the rigid rib j the aggregate width of the web formed by thepieces j and Z can be increased or reduced to correspond with the width of the groove in which the tool-holder is to be secured.

The adjustable wedge Z may be secured to the rib j by a set-screw,- m, whichis tapped into the rib j, and which passes through an elongatedhole, a, in the wedge Z, so that upon loosening the screw the wedge loan be adj ust ed, and after adjustment can be tightened by means of the screw a in an obvious manner.

The pieces j and Z may be provided on their adjacent inclined faces with alongitudinal rib formed on one part and projecting into a groove in the other part, to retain the parts in their proper relative position, and prevent the movable piece from turning on the screw in adjusting the same.

The end portion of the extension 9' is provided with a raised edge, 9, adjacent to the cutter-head, whereby the pressure in tightening the bolt 3 is thrown upon the raised edge g and the beading-tool B, thereby clamping IOO thereto, of a tool-holder provided with a rib, j, projecting into said groove, and adjusting mechanism applied to the side of said rib, substantially as described, whereby the width of vided with a longitudinal groove, of a tool- 5 said rib can be adjusted to correspond with holder composed of a socket portion, d, havthe width of said groove, substantially as set I ing a groove, 6, and an extension, 9, havinga groove, for adjusting the Width of the rib to fit in the groove, substantially as set forth.

3. The combination, with a cutter-head pro- 15 forth. bolt-hole, h, and a raised edge, 9, substantially 2. The combination, With a cutter-head havas set forth. ing a groove, a, for securing a tool-holder JOHN F. PARKES. 1o thereto, of atool-holder' provided with a rib, Witnesses:

j, projecting into said groove, and adjusting- CHAS. F. GEYER, screws 70, applied to the side of said rib in said JOHN J. BONNER. 

